[bitnami/kubernetes-event-exporter] fix: kubernetes-event-exporter default config layout shows empty logs

[paulfouquet]

Description of the change

Remove the default log layout in the event-exporter config.receivers.file default values.

Benefits

When using this Helm chart without overwriting config.receivers.file, the default log layout being empty ({}):

receivers:
- file:
    layout: {}
    path: /dev/stdout
  name: dump

The config above will cause the logs to be empty.

The workaround to avoid this issue is to specify a config.receivers.file while using the helm chart. For example:
{"receivers": [{"name": "dump", "file": {"path": "/dev/stdout"}}}, which will generate the following config.receiver:

receivers:
- file:
    path: /dev/stdout
  name: dump

This change avoid using the workaround above and let the user not overwriting the config to use the default one.

Possible drawbacks

Applicable issues

• fixes [bitnami/kubernetes-event-exporter] default config shows empty logs #34880

Additional information

See #34880 for more information about the issue that this PR fixes.

Checklist

• Chart version bumped in Chart.yaml according to semver. This is not necessary when the changes only affect README.md files.
• Variables are documented in the values.yaml and added to the README.md using readme-generator-for-helm
• Title of the pull request follows this pattern [bitnami/<name_of_the_chart>] Descriptive title
• All commits signed off and in agreement of Developer Certificate of Origin (DCO)

[gongomgra]

Hi @paulfouquet,

Thanks for taking the time on checking this issue and for creating a pull request. Your contribution is highly appreciated! I have been checking this and I have been able to reproduce your issue. However, I found out that instead of removing the parameter from the values.yaml file, you can set it to null and it will print the log messages you are missing.

What do you think about updating the default value from {} to null? In case you agree, please also update it from our default runtime-parameters.yaml file at .vib/kubernetes-event-exporter/runtime-parameters.yaml.

$ cat custom.yaml
config:
  kubeQPS: 60
  kubeBurst: 60
  logLevel: debug
  logFormat: pretty
  receivers:
    - name: dump
      file:
        path: /dev/stdout
        layout: null
  route:
    routes:
      - match:
          - receiver: dump
(...)

$ helm install -f ./custom.yaml (...)
$ k -n kubernetes-event-exporter logs -f k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp
{"level":"info","time":"2025-07-29T15:49:38Z","message":"Reading config file /data/config.yaml"}
2025-07-29T15:49:38Z DBG setting config.cacheSize=1024 (default)
2025-07-29T15:49:38Z INF Starting with config: exporter.Config{LogLevel:"debug", LogFormat:"pretty", ThrottlePeriod:0, MaxEventAgeSeconds:0, ClusterName:"", Namespace:"", LeaderElection:kube.LeaderElectionConfig{Enabled:false, LeaderElectionID:""}, Route:exporter.Route{Drop:[]expor
ter.Rule(nil), Match:[]exporter.Rule(nil), Routes:[]exporter.Route{exporter.Route{Drop:[]exporter.Rule(nil), Match:[]exporter.Rule{exporter.Rule{Labels:map[string]string(nil), Annotations:map[string]string(nil), Message:"", APIVersion:"", Kind:"", Namespace:"", Reason:"", Type:"",
MinCount:0, Component:"", Host:"", Receiver:"dump"}}, Routes:[]exporter.Route(nil)}}}, Receivers:[]sinks.ReceiverConfig{sinks.ReceiverConfig{Name:"dump", InMemory:(*sinks.InMemoryConfig)(nil), Webhook:(*sinks.WebhookConfig)(nil), File:(*sinks.FileConfig)(0x4000532e80), Syslog:(*sin
ks.SyslogConfig)(nil), Stdout:(*sinks.StdoutConfig)(nil), Elasticsearch:(*sinks.ElasticsearchConfig)(nil), Kinesis:(*sinks.KinesisConfig)(nil), Firehose:(*sinks.FirehoseConfig)(nil), OpenSearch:(*sinks.OpenSearchConfig)(nil), Opsgenie:(*sinks.OpsgenieConfig)(nil), Loki:(*sinks.Loki
Config)(nil), SQS:(*sinks.SQSConfig)(nil), SNS:(*sinks.SNSConfig)(nil), Slack:(*sinks.SlackConfig)(nil), Kafka:(*sinks.KafkaConfig)(nil), Pubsub:(*sinks.PubsubConfig)(nil), Opscenter:(*sinks.OpsCenterConfig)(nil), Teams:(*sinks.TeamsConfig)(nil), BigQuery:(*sinks.BigQueryConfig)(ni
l), EventBridge:(*sinks.EventBridgeConfig)(nil), Pipe:(*sinks.PipeConfig)(nil)}}, KubeQPS:60, KubeBurst:60, MetricsNamePrefix:"", OmitLookup:false, CacheSize:1024}
2025-07-29T15:49:38Z INF setting config.maxEventAgeSeconds=5 (default)
2025-07-29T15:49:38Z WRN metrics name prefix is empty, setting config.metricsNamePrefix='event_exporter_' is recommended
2025-07-29T15:49:38Z INF Registering sink name=dump type=*sinks.File
2025-07-29T15:49:38Z INF levelinfomsgListening onaddress[::]:2112
2025-07-29T15:49:38Z INF levelinfomsgTLS is disabled.http2falseaddress[::]:2112
2025-07-29T15:49:38Z INF leader election disabled
2025-07-29T15:49:38Z DBG Received event involvedObject=k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp msg="Successfully assigned kubernetes-event-exporter/k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp to orbstack" namespace=kubernetes-event-exporter reason=Scheduled
2025-07-29T15:49:38Z DBG Received event involvedObject=k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp msg="Container image \"docker.io/bitnami/kubernetes-event-exporter:1.7.0-debian-12-r43\" already present on machine" namespace=kubernetes-event-exporter reason=Pulled
2025-07-29T15:49:38Z DBG sending event to sink event="Successfully assigned kubernetes-event-exporter/k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp to orbstack" sink=dump
{"metadata":{"name":"k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp.1856c39b820097fe","namespace":"kubernetes-event-exporter","uid":"8984bc1a-a544-4fdf-ac5c-e80a62966d04","resourceVersion":"790323","creationTimestamp":"2025-07-29T15:49:37Z"},"reason":"Scheduled","message":"Successf
ully assigned kubernetes-event-exporter/k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp to orbstack","source":{},"firstTimestamp":null,"lastTimestamp":null,"type":"Normal","eventTime":"2025-07-29T15:49:37.575808Z","action":"Binding","reportingComponent":"default-scheduler","reportin
gInstance":"default-scheduler-orbstack","clusterName":"","involvedObject":{"kind":"Pod","namespace":"kubernetes-event-exporter","name":"k8s-kubernetes-event-exporter-575d9ccbfc-wrtjp","uid":"89daf650-5cce-4b17-9457-f5efe78dbfdf","apiVersion":"v1","resourceVersion":"790317","labels"
:{"app.kubernetes.io/component":"kubernetes-event-exporter","app.kubernetes.io/instance":"k8s","app.kubernetes.io/managed-by":"Helm","app.kubernetes.io/name":"kubernetes-event-exporter","app.kubernetes.io/version":"1.7.0","helm.sh/chart":"kubernetes-event-exporter-3.6.1","pod-templ
ate-hash":"575d9ccbfc"},"annotations":{"checksum/config":"be2fc8522a0354c3f8a301f16ef88d149cc4738c7b01cb5e566c99ac8df59102"},"ownerReferences":[{"apiVersion":"apps/v1","kind":"ReplicaSet","name":"k8s-kubernetes-event-exporter-575d9ccbfc","uid":"26201809-9679-471e-ba52-9a99c79607b7"
,"controller":true,"blockOwnerDeletion":true}],"deleted":false}}

[gongomgra]

Please check my comment about setting a different default value instead of removing the parameter from the values.yaml file.

[gongomgra]

@paulfouquet did you have any chance to check my proposal?

[paulfouquet]

@paulfouquet did you have any chance to check my proposal?

Hi @gongomgra sorry for the delay, I'll make some changes today!

[paulfouquet]

Sorry I totally messed up this PR... I've created a new one #35983